Re: [Qemu-devel] [PATCHv2] qemu-img: set nocow flag to new file

2013-11-17 Thread Chunyan Liu
2013/11/15 Kevin Wolf > Am 15.11.2013 um 06:01 hat Chunyan Liu geschrieben: > > Set NOCOW flag to newly created images to solve performance issues on > btrfs. > > > > Btrfs has terrible performance when hosting VM images, even more when > the guest > > in those VM are also using btrfs as file sys

Re: [Qemu-devel] [PATCHv2] qemu-img: set nocow flag to new file

2013-11-15 Thread Kevin Wolf
Am 15.11.2013 um 06:01 hat Chunyan Liu geschrieben: > Set NOCOW flag to newly created images to solve performance issues on btrfs. > > Btrfs has terrible performance when hosting VM images, even more when the > guest > in those VM are also using btrfs as file system. One way to mitigate this bad

[Qemu-devel] [PATCHv2] qemu-img: set nocow flag to new file

2013-11-14 Thread Chunyan Liu
Set NOCOW flag to newly created images to solve performance issues on btrfs. Btrfs has terrible performance when hosting VM images, even more when the guest in those VM are also using btrfs as file system. One way to mitigate this bad performance is to turn off COW attributes on VM files (since ha